Read BigSheet with 'R programming' Ref: http://www.r-bloggers.com/writing-from-r-to-excel-with-xlsx/ http://stackoverflow.com/questions/7963393/out-of-memory-error-java-when-using-r-and-xlconnect-package and http://stackoverflow.com/questions/12625481/memoryerror-in-r-while-read-xlsx